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(11) | EP 0 085 143 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Infrared temperature probe for high pressure use |
| (57) An infrared temperature probe for high pressure use is in the form of a hollow bolt
adapted to be threaded into a complementary threaded aperture in the wall of a pressure
vessel with the end thereof disposed flush with the internal surface of the pressure
vessel wall. An infrared transparent window is secured in the end of the hollow bolt
with one surface thereof disposed flush with the end of the bolt. A bundle of optical
fibers is secured within the opposite end of the hollow bolt and a glass rod is mounted
within the hollow bolt in operative relation to the window and the optical fiber bundle
for transmitting infrared radiation from the window to the optical fiber bundle. The
interior of the hollow bolt may be supplied wth a circulating cooling liquid or gas.
An infrared temperature probe can also be used with a mold having an aperture for
receiving an ejector pin wherein the hollow ejector pin is provided with an impact
surface at one end and an infrared transparent window in the opposite end for receiving
infrared radiation from a hot moulded article within the mold when the ejector pin
is located within the aperture in the mold. A bundle of optical fibers extends through
the hollow ejector pin and is disposed in optical transmitting engagement with the
window. |